Silicone monomer
a technology of silicon monomer and silicon monomer, which is applied in the field of silicon monomer, can solve the problems of inconvenient use as soft contact lens material, inability to provide transparent monomers, and inability to use as lens materials, and achieve the effect of easy manufacturing and high purity
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example 1
Synthesis of MASS (methacryloyloxyethyl succinate 3-[tris(trimethylsiloxy)silyl]propyl)
[0055]A 1 L pear-shaped flask was charged with 59.39 g of 2-methacryloyloxyethyl succinate (0.258 moles, manufactured by KYOEISHA CHEMICAL CO., LTD.), 637.56 g of N,N-dimethylformamide, 29.74 g potassium carbonate (0.215 moles), and 4-methoxyphenol, and the resulting solution was heated to 40° C. After the temperature was raised, 100.0 g of 3-iodopropyltris(trimethylsiloxy)silane (0.215 moles) was added dropwise, and the mixture was further stirred for 2 hours. The reaction solution was cooled, and then transferred to a 5 L separating funnel, diluted with 1200 g of ethyl acetate, washed three times with 1200 g of 5% sodium hydrogen carbonate, and further washed twice with 1200 g of 2% sodium sulfate. By removing the solvent, 112.9 g of a colorless, transparent silicone compound of the formula below was obtained (at 75.5% yield).
[0056]The purity of the obtained silicone compound was 91.1 mass %. Th...
example 2
Synthesis of AESS (acryloyloxyethyl succinate 3-[tris(trimethylsiloxy)silyl]propyl)
[0062]A 1 L pear-shaped flask was charged with 83.66 g of 2-acryloyloxyethyl succinate (0.387 moles, manufactured by KYOEISHA CHEMICAL CO., LTD.), 1018.32 g of N,N-dimethylformamide, 44.61 g of potassium carbonate (0.323 moles), and 4-methoxyphenol, and the resulting solution was heated to 40° C. After the temperature was raised, 150.0 g of 3-iodopropyltris(trimethylsiloxy)silane (0.323 moles) was added dropwise, and the mixture was further stirred for 2 hours. The reaction solution was cooled, and then transferred to a 5 L separating funnel, diluted with 1200 g of ethyl acetate, washed three times with 1200 g of 5% sodium hydrogen carbonate, and further washed twice with 2% sodium sulfate. By removing the solvent, 134.0 g of a colorless, transparent silicone compound of the formula below was obtained (at 75.0% yield).
[0063]By the 1H-NMR measurement of the obtained silicone compound, peaks derived fro...
example 3
Test on Contact Lens Model Containing Compound of Formula (2) Prepared in Example 1 as Polymerizable Component
[0067]40 parts by mass of the compound of formula (2) prepared in Example 1, 60 parts by mass of 2-hydroxyethylmethacrylate, 0.5 parts by mass of ethylene glycol dimethacrylate, and 0.5 parts by mass of azobisisobutyronitrile were mixed and dissolved. The resulting solution was poured into a cell made of a glass plate and a polypropylene plate with a 0.1 mm thick polyethylene terephthalate sheet interposed therebetween as a spacer. The atmosphere in an oven was substituted with nitrogen, and the cell was heated at 100° C. for 2 hours for polymerization. After polymerization, the cured sheet was taken out of the mold, soaked in a 3 / 1 mixed solution of ethyl alcohol and ion exchanged water for 12 hours, and then in ion exchanged water for 12 hours to obtain a hydrous film. The hydrous film thus obtained was prepared into the shapes required for various measurements, and the tr...
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